https://bugs.webkit.org/show_bug.cgi?id=97167

Reviewed by Hajime Morita.

Source/WebCore:

* page/ValidationMessageClient.h:
Add forward declaration for WTF::String.

Source/WebKit/chromium:

Introduce ValidationMessageClientImpl. However actual popup
implementation should be done in WebViewClient.

* WebKit.gyp: Add ValidationMessageClientImpl.{cpp,h}.
* public/WebViewClient.h:
(WebKit::WebViewClient::showValidationMessage): Added.
(WebKit::WebViewClient::hideValidationMessage): Added.
* src/ValidationMessageClientImpl.cpp: Added.
(WebKit::ValidationMessageClientImpl::ValidationMessageClientImpl):
(WebKit::ValidationMessageClientImpl::create):
(WebKit::ValidationMessageClientImpl::~ValidationMessageClientImpl):
Make sure that a popup is closed.
(WebKit::ValidationMessageClientImpl::showValidationMessage):
Implementataion of ValidationMessageClient::showValidationMessage.
minimumSecondToShowValidationMessage and secondPerCharacter are same as
the corresponding values in the current Shadow DOM implementation.
(WebKit::ValidationMessageClientImpl::hideValidationMessage):
Implementataion of ValidationMessageClient::hideValidationMessage.
(WebKit::ValidationMessageClientImpl::isValidationMessageVisible):
Implementataion of ValidationMessageClient::isValidationMessageVisible.
(WebKit::ValidationMessageClientImpl::hideCurrentValidationMessage):
This is a callback function for the timer.
* src/ValidationMessageClientImpl.h: Added.

* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::WebViewImpl):
 - Initialize m_validationMessage.
 - Add a comment for PageClients.
* src/WebViewImpl.h:
Add m_validationMessage.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@129443 268f45cc-cd09-0410-ab3c-d52691b4dbfc